Ag Nanowire Reinforced Highly Stretchable Conductive Fibers for Wearable Electronics
Ag Nanowire Reinforced Highly Stretchable Conductive Fibers for Wearable Electronics
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DOI：
10.1002/adfm.201500628
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发表时间：
2015-06-03
影响因子：
19
通讯作者：
Lee, Taeyoon
中科院分区：
文献类型：
--
作者：
Lee, Seulah;Shin, Sera;Lee, Taeyoon
可伸缩导电纤维因其在可穿戴和可折叠电子产品中的应用而受到广泛关注。在本论文中，我们制备了由银纳米线(AgNWs)和银纳米颗粒(AgNPs)镶嵌在丁苯(SBS)弹性体基质中的高伸缩导电纤维。采用一种简单的湿法纺丝方法制备了AgNW包埋SBS纤维。然后，通过反复的银前驱体吸附和还原过程，在AgNW包埋纤维的表面和内部区域形成AgNPs。由于导电填料的重量百分比较高以及使用了高度可伸缩的SBS弹性体，包埋AgNW的导电纤维具有优异的初始电导率(sigma(0)=2450 S cm(-1))和断裂伸长率(900%应变)。在拉伸过程中，嵌入的AgNW充当了AgNPs之间的导电桥，从而在高应变下保持了电导率(100%应变时的电导率退化速率sigma/sigma(0)=4.4%)。包埋AgNW的导电纤维在较宽的拉伸应变范围内表现出应变传感行为。通过在手套中集成五种复合纤维，可以将AgNW增强的高度可伸缩的导电纤维嵌入到手语检测智能手套中，从而成功地感知人体运动。
Stretchable conductive fibers have received significant attention due to their possibility of being utilized in wearable and foldable electronics. Here, highly stretchable conductive fiber composed of silver nanowires (AgNWs) and silver nanoparticles (AgNPs) embedded in a styrene-butadiene-styrene (SBS) elastomeric matrix is fabricated. An AgNW-embedded SBS fiber is fabricated by a simple wet spinning method. Then, the AgNPs are formed on both the surface and inner region of the AgNW-embedded fiber via repeated cycles of silver precursor absorption and reduction processes. The AgNW-embedded conductive fiber exhibits superior initial electrical conductivity (sigma(0) = 2450 S cm(-1)) and elongation at break (900% strain) due to the high weight percentage of the conductive fillers and the use of a highly stretchable SBS elastomer matrix. During the stretching, the embedded AgNWs act as conducting bridges between AgNPs, resulting in the preservation of electrical conductivity under high strain (the rate of conductivity degradation, sigma/sigma(0) = 4.4% at 100% strain). The AgNW-embedded conductive fibers show the strain-sensing behavior with a broad range of applied tensile strain. The AgNW reinforced highly stretchable conductive fibers can be embedded into a smart glove for detecting sign language by integrating five composite fibers in the glove, which can successfully perceive human motions.